CN215220475U - Lead shielding tube structure with good heat dissipation function - Google Patents
Lead shielding tube structure with good heat dissipation function Download PDFInfo
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- CN215220475U CN215220475U CN202121319434.XU CN202121319434U CN215220475U CN 215220475 U CN215220475 U CN 215220475U CN 202121319434 U CN202121319434 U CN 202121319434U CN 215220475 U CN215220475 U CN 215220475U
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Abstract
The utility model belongs to power transformer makes the field, and the lead wire shielding tube structure that has good heat dissipation function specifically says so. The method comprises the following steps: the long stay component, the support cylinder, the insulating cylinder, the outer layer insulation and the oil discharge hole are arranged on the lead shielding tube; wherein, the wall of the oil drain hole is coated with an insulating layer; a supporting cylinder is sleeved on the shielding pipe; the support cylinder includes: a cylindrical section and a conical section connected with the cylindrical section into a whole; the cylindrical section of the supporting cylinder is sleeved on the lead shielding tube at the oil discharge hole, and an insulating cylinder is arranged between the conical section of the supporting cylinder and the lead shielding tube; the insulating cylinder is matched with the conical cylinder section of the supporting cylinder; a long stay assembly is clamped between the insulating cylinder and the supporting cylinder; the outer layer insulation is coated on the lead shielding tube, and the thickness of the outer layer insulation is equal to the outer diameter of the conical barrel section of the supporting barrel. The utility model discloses a set up the oil drain hole that has long stay subassembly and solved in the past the contradiction between insulating properties and the heat dispersion in the lead wire shielding tube structure with the insulating cylinder cooperation.
Description
Technical Field
The utility model belongs to power transformer makes the field, and the lead wire shielding tube structure that has good heat dissipation function specifically says so.
Background
The lead shielding tube is a necessary component of the extra-high voltage transformer for lead electric field homogenization, and the insulation performance and the heat dissipation performance of the lead shielding tube directly influence the safe and reliable operation of the transformer and even a power grid. With the rapid development of the ultra-high voltage power grid technology, the rated capacity and the voltage grade of an alternating current-direct current transformer used in the power grid are continuously improved, and higher requirements are provided for the insulating property and the heat dissipation performance of a lead shielding tube of the transformer. The rise of the voltage level of the transformer directly determines the rise of the insulation level of the lead shielding tube; with the increase of the transformer capacity, on one hand, the increase of lead current directly leads to the increase of the loss of lead cables in the shielding tube, and on the other hand, the increase of the leakage magnetic field at the end part of the transformer winding leads to the sharp increase of the eddy current loss of the shielding tube. The loss of the lead cable in the shielding tube and the eddy current loss of the shielding tube are radiated in the form of heat energy, local overheating is easily caused on a large-capacity transformer, generally, in the structure, the insulation performance and the heat radiation performance of the shielding tube have a contradiction relationship, in order to improve the insulation performance, the thickness of the external insulation layer of the shielding tube needs to be increased, and the heat radiation capacity is reduced due to the insulation layer with the increased thickness.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims at providing a lead wire shielding tube structure with good heat dissipation function to solve because the oil stream is difficult for flowing, when transformer capacity is super large, very easily take place the local overheat of lead wire, insulating and radiating contradiction problem both can guarantee that high voltage class transformer lead wire shielding tube has sufficient insulating properties, has good heat dissipation function again, has avoided the local overheat risk of large capacity transformer lead wire shielding tube.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is:
lead shielding tube structure with good heat dissipation function includes: the long stay component, the support cylinder, the insulating cylinder, the outer layer insulation and the oil discharge hole are arranged on the lead shielding tube;
the wall of the oil discharge hole is coated with an insulating layer; a support cylinder is sleeved on the lead shielding pipe at the oil discharge hole;
the support cylinder includes: the cylinder section and the conical cylinder section are connected into a whole;
the cylindrical section of the supporting cylinder is sleeved on the lead shielding tube at the oil discharge hole, and an insulating cylinder is arranged between the conical section of the supporting cylinder and the lead shielding tube; the insulating cylinder is matched with the conical cylinder section of the supporting cylinder;
a long stay assembly is clamped between the insulating cylinder and the supporting cylinder; the outer layer is insulated and coated on the lead shielding tube.
The insulating cylinder is a solid conical cylinder structure stacked and covered by insulating crepe paper.
The insulating cylinder is sleeved on the lead shielding pipes on two sides or any side of the oil discharge hole.
The long stay assembly comprising: a plurality of long stays uniformly arranged along the circumferential direction of the lead shielding tube; the long stay is provided with a crenelation structure for bending the long stay; the long stay at one side of the crenellated structure is an oil duct stay, and the long stay at the other side of the crenellated structure is an insulating stay;
the oil duct stay is arranged between the cylindrical section of the supporting cylinder and the lead shielding pipe at the oil discharge hole, and an upper notch is formed in the oil duct stay; the upper notch is provided with a notch for oil flow of the oil discharge hole, and the direction of the notch is opposite to the oil discharge hole;
the insulating supporting strip is arranged between the insulating cylinder and the conical cylinder section of the supporting cylinder and is bonded on the outer surface of the insulating cylinder.
A plurality of notches are arranged on the upper notches in parallel, and the corresponding notches on two adjacent upper notches are communicated end to end so as to form a circular channel on the oil drain hole; the width of the notch is less than 30 mm.
A plurality of oil discharge holes are formed, and the oil discharge holes are round holes processed by round corners; the width of the oil discharge hole is larger than 10mm, and the length of the oil discharge hole is larger than 30 mm.
A plurality of short supporting strips for preventing the outer layer insulation from collapsing are uniformly distributed between the conical cylinder and the outer layer insulation of the supporting cylinder, and the short supporting strips are fixedly arranged on the surface of the conical cylinder of the supporting cylinder between two adjacent long supporting strips; the short stay and the stay of the long stay are parallel to each other.
The insulating layer is made of insulating paper and covers the wall of the oil drain hole;
one end of the insulating layer extends out of the oil discharge hole and is attached to the inner wall of the lead shielding pipe, and the other end of the insulating layer extends into the oil discharge hole and is attached to the outer wall of the lead shielding pipe;
the thickness of the insulating layer is as follows: 1 mm-2 mm, and the length of the insulating layer extending to the inner wall of the lead shielding tube and the outer wall of the lead shielding tube is more than 10 mm.
The thickness of the outer layer insulation is the distance between the outer wall of the lead shielding tube and the tail end of the conical tube section of the corresponding supporting tube.
The utility model has the following beneficial effects and advantages:
1. the utility model solves the contradiction between the insulation performance and the heat dissipation performance in the prior lead shielding pipe structure by arranging the oil discharge hole with the long stay component and matching the insulating cylinder;
2. the utility model discloses a lead wire shielding pipe guarantees that it has enough electrical strength through the fillet ization of oil extraction hole and surface insulation cover, forms the convenient discharge of heat that the eddy current loss of inside and outside oil flow circulation channel with lead wire cable and shielding pipe self produced through setting up oil extraction hole, insulating stay and notch, makes it have good heat dispersion, has expanded the space for the development of special high voltage, the transformer of super large capacity.
3. The utility model discloses a novel lead shielding tube simple structure, low in manufacturing cost, simple to operate have realized improving product property ability, have reduced product cost's effect.
Drawings
FIG. 1a is a schematic view of an "n" lead shielding tube according to the present invention;
FIG. 1b is a schematic view of a "n" shaped shielding tube of the present invention;
fig. 2 is a schematic longitudinal sectional view of the lead shielding tube of the present invention;
fig. 3 is a cross-sectional view of the lead shielding tube of the present invention;
fig. 4 is a schematic structural view of the lead shielding tube insulating cylinder of the present invention;
FIG. 5 is a partial enlarged view of the insulation layer of the lead shielding tube of the present invention;
fig. 6 is a schematic view of the overall structure of the lead shielding tube of the present invention;
fig. 7 is a schematic view of a long stay assembly in a lead shielding tube according to the present invention;
fig. 8 is a schematic structural view of a support cylinder in the lead shielding tube of the present invention;
wherein, 1 is lead wire shielding pipe, 2 is the oil drain hole, 3 is the insulating layer, 4 is the insulating cylinder, 5 is long stay, 6 is the buttress mouth structure, 7 is the notch, 8 is short stay, 9 is a support section of thick bamboo, 10 is outer insulating, 11 is the oil duct stay, 12 is insulating stay, 13 is the notch.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1a and 1b, the lead shielding tube in "n" and "several" shapes is shown; the lead shielding tube 1 is a shielding tube made of a conductor material with an oil drain hole 2.
The utility model discloses a: the lead shielding tube is composed of a lead shielding tube 1 with an oil discharge hole 2, an insulating layer 3, an insulating cylinder 4, a long stay 5 with a crenellated structure 6 and an upper notch 7, a short stay 8, a supporting cylinder 9 and an outer layer insulator 10;
wherein, the wall of the oil drain hole 2 is coated with an insulating layer 3; the inner and outer peripheries of the oil drain hole 2 are rounded and covered by an insulating layer 3 with the thickness of 1 to 2mm, so that the requirement of insulating property is met. The width of the long round hole before covering insulation is not less than 10mm, and the length of the long round hole before covering insulation is not less than 30mm, so that the oil flow heat dissipation requirement is met.
As shown in fig. 8, which is a schematic structural diagram of the supporting cylinder of the present invention, in order to prevent the outer layer insulation 10 from collapsing, the supporting cylinder 9 is sleeved on the long stay 5; the support cylinder 9 includes: a cylindrical section and a conical section connected with the cylindrical section into a whole; the cylindrical section of the supporting cylinder 9 is sleeved on the lead shielding tube 1 at the oil discharge hole 2, and an insulating cylinder 4 is arranged between the conical cylinder section of the supporting cylinder 9 and the lead shielding tube 1; the insulating cylinder 4 is matched with the conical cylinder section of the supporting cylinder 9; a long stay assembly is clamped between the insulating cylinder 4 and the supporting cylinder 9;
as shown in fig. 2-3, for the utility model discloses lead wire shielding tube trompil sketch map is the cross-sectional view: the oil discharge holes 2 are provided in plurality, the width of the oil discharge holes 2 is larger than 10mm, and the length of the oil discharge holes 2 is larger than 30 mm. In the present embodiment, three oil drain holes 2 are processed above the installation direction of the lead shielding tube 1, and the actual number, size and specific position of the oil drain holes 2 can be determined according to the requirement of the oil flow to be dissipated. The inner and outer peripheries of an oil discharge hole 2 processed on the lead shielding tube 1 are required to be rounded, and the oil discharge hole is in a long round hole structure.
As shown in fig. 4, for the insulation cylinder structure diagram of the lead shielding tube of the present invention, the oil discharge hole 2 processed on the lead shielding tube 1 is covered with the insulation crepe paper to form the insulation layer 3, and then covered with the insulation paper to form the tight solid conical insulation cylinder 4 on the left and right sides (or both sides) of the oil discharge hole 2.
The length of insulating cylinder 4 should be greater than 5 times of the insulating 10 gross thickness in the lead wire shielding tube 1 outer strata to satisfy the insulating creep strength of edge oil duct stay 11 direction behind the increase oil drain hole 2, guarantee that the insulating properties of the lead wire shielding tube 1 behind the increase oil drain hole 2 does not reduce.
As shown in fig. 5, for the utility model discloses the local enlarger of lead wire shielding pipe insulating layer, 3 thickness of insulating layer are 1mm ~ 2mm, stretch into downthehole wall length and are greater than 10mm to guarantee insulating properties.
As shown in fig. 6-7, it is the overall structure diagram of the lead shielding tube of the present invention. Long stay 5 can adopt two sections structures, also can adopt whole root long stay 5 to go up and cut out a buttress mouth structure 6, makes things convenient for the stay to buckle, and is difficult for lodging to the oil stream of shielding pipe inside also can circulate in the circumferencial direction, improves the cooling effect, and the total width of notch 13 will be greater than the width of slotted hole, can set up a plurality of notches 13, and the width of single notch 13 is not more than 30 millimeters, takes place to cave in order to avoid wrapping the stay when external insulation. In this embodiment, long stay assemblies 5 with a chopper structure 6 and short stays 8 are placed radially outside the conical structure insulation 4 on the lead shielding tube 1 in the circumferential direction.
One side of the crenels structure 6 is provided with an oil duct stay 11, and the other side of the crenels structure 6 is provided with an insulating stay 13;
the oil duct stay 11 is arranged between the cylinder section of the supporting cylinder 9 and the oil discharge hole 2, and the oil duct stay 11 is provided with an upper notch 7; the upper notch 7 is provided with a notch 13 for oil flow of the oil discharge hole 2; insulating stay 13 is located between the conical section of insulating cylinder 4 and support cylinder 9 clamp, promptly: the long stay 5 is placed from the cylindrical barrel section of the support barrel 9 pre-wrapped outside the lead shielding tube 1 up to the end of the tapered barrel section of the support barrel 9.
Go up and be equipped with a plurality of notches on the notch 7 side by side, the notch that corresponds on two adjacent last notches 7 communicates end to form the ring shape channel in oil drain hole 2 top, the width of notch is less than 30 mm.
A plurality of short stay bars 8 for preventing the collapse of the outer layer insulation 10 are uniformly distributed between the conical cylinder of the supporting cylinder 9 and the outer layer insulation 10, the short stay bars 8 are arranged on the supporting cylinder above the two adjacent long stay bars 5, and the long stay bars 5 and the short stay bars 8 are all bonded on the conical insulation surface by epoxy resin adhesive with excellent insulation performance. The upper notch 7 should be placed toward the lead shielding tube 1 for oil flow, and the crenels 6 are formed on the long stay 5 for bending. After the long stay 5 and the short stay 8 are placed, the outer layer insulation 10 of the lead shielding tube is covered by insulating crepe paper on the outer side.
Example 1: the embodiment adopts the prior lead shielding tube 1, the outer diameter of which is 130mm, and the wall thickness of which is 4 mm; the lead shielding tube 1 is provided with three oil discharge holes 2 with the width of 10mm and the length of 30 mm; the thickness of the insulating layer 3 is 2mm, the length of the insulating layer extending into the inner wall of the lead shielding tube 1 is 12mm, the length of the insulating layer extending out of the lead shielding tube 1 and attached to the outer wall of the lead shielding tube 1 is 12mm, the maximum size of the thickness of the insulating cylinder 4 is 120mm (excluding the outer diameter of the lead shielding tube 1), and the total length of the insulating cylinder 4 is 350 mm;
the lead shielding tube 1 is provided with 12 long supporting strips 5 and short supporting strips 8 uniformly along the circumferential direction, the number of notches in an upper notch 7 of each long supporting strip 5 is 2, the width of each notch is 10mm, and an annular groove is formed on the lead shielding tube 1;
adopt insulating crepe paper to pile up the cover and form outer insulating 10 on lead wire shielding tube 1, a support section of thick bamboo 9 and short stay, the thickness size of outer insulating 10 is 60mm, and the application effect is compared with current lead wire shielding tube structure, to as shown in following table 1:
TABLE 1
As can be seen from table 1, the utility model forms an internal and external oil circulation channel by arranging the oil discharge hole 2, the long stay 5 and the notch thereof to conveniently discharge the heat generated by the eddy current loss of the lead cable and the lead shielding tube 1, and compared with the existing lead shielding tube structure, the utility model has good heat radiation performance; meanwhile, the arrangement of the supporting cylinder 9 and the short stay 8 effectively prevents the collapse phenomenon generated when the temperature of the external insulation 10 is too high. And (4) conclusion: the utility model discloses a contradiction between insulating properties and the heat dispersion in the current lead wire shielding tube structure in the past has been solved in the cooperation of long brace subassembly, oil drain hole 2 and insulating cylinder 4.
Claims (9)
1. Lead wire shielding tube structure with good heat dissipation function, its characterized in that includes: the lead shielding tube comprises a long stay component, a supporting cylinder (9), an insulating cylinder (4), an outer layer insulator (10) and an oil discharge hole (2) formed in the lead shielding tube (1);
the wall of the oil drain hole (2) is coated with an insulating layer (3); a support cylinder (9) is sleeved on the lead shielding tube (1) at the oil discharge hole (2);
the support cylinder (9) comprising: the cylinder section and the conical cylinder section are connected into a whole;
the cylindrical section of the supporting cylinder (9) is sleeved on the lead shielding tube (1) at the oil discharge hole (2), and an insulating cylinder (4) is arranged between the conical cylinder section of the supporting cylinder (9) and the lead shielding tube (1); the insulating cylinder (4) is matched with the conical cylinder section of the supporting cylinder (9);
a long stay assembly is clamped between the insulating cylinder (4) and the supporting cylinder (9); the outer layer insulation (10) is coated on the lead shielding tube (1).
2. The lead shielding tube structure with good heat dissipation function as claimed in claim 1, wherein the insulating cylinder (4) is a solid cone-shaped cylinder structure covered by an insulating crepe paper stack.
3. The lead shielding tube structure with good heat dissipation function according to claim 1, wherein the insulating cylinder (4) is sleeved on the lead shielding tube (1) at two sides or at any side of the oil drain hole (2).
4. The lead shielding tube structure with good heat dissipation function as claimed in claim 1, wherein the long stay assembly comprises: a plurality of long stays (5) uniformly arranged along the circumferential direction of the lead shielding tube (1); the long stay (5) is provided with a crenellated structure (6) for bending the long stay (5); the long stay (5) on one side of the crenellated structure (6) is an oil duct stay (11), and the long stay (5) on the other side of the crenellated structure (6) is an insulating stay (12);
the oil duct stay (11) is arranged between the cylinder section of the supporting cylinder (9) and the lead shielding pipe (1) at the oil discharge hole (2), and the oil duct stay (11) is provided with an upper notch (7); a notch (13) for oil flow of the oil discharge hole (2) is formed in the upper notch (7), and the direction of the notch (13) is opposite to that of the oil discharge hole (2);
the insulating supporting strips (12) are arranged between the insulating cylinder (4) and the conical cylinder sections of the supporting cylinder (9) and are bonded on the outer surface of the insulating cylinder (4).
5. The lead shielding tube structure with good heat dissipation function according to claim 4, wherein a plurality of notches (13) are arranged in parallel on the upper recesses (7), and corresponding notches (13) on two adjacent upper recesses (7) are communicated end to form a circular groove channel on the oil drain hole (2); the width of the notch is less than 30 mm.
6. The lead shielding pipe structure with good heat dissipation function according to claim 1, wherein a plurality of oil drain holes (2) are provided, and the oil drain holes (2) are round holes processed by round corners; the width of the oil discharge hole (2) is larger than 10mm, and the length of the oil discharge hole (2) is larger than 30 mm.
7. The lead shielding tube structure with good heat dissipation function according to claim 1, wherein a plurality of short supporting strips (8) for preventing the outer insulation (10) from collapsing are uniformly arranged between the conical tube of the supporting tube (9) and the outer insulation (10), and the short supporting strips (8) are fixedly arranged on the surface of the conical tube of the supporting tube (9) between two adjacent long supporting strips (5); the short stay (8) and the stay of the long stay (5) are parallel to each other.
8. The lead shielding tube structure with good heat dissipation function according to claim 1, wherein the insulating layer (3) is insulating paper, and the insulating layer (3) covers the wall of the oil drain hole (2);
one end of the insulating layer (3) extends out of the oil discharge hole (2) and is attached to the inner wall of the lead shielding tube (1), and the other end of the insulating layer extends into the oil discharge hole (2) and is attached to the outer wall of the lead shielding tube (1);
the thickness of the insulating layer (3) is as follows: 1 mm-2 mm, and the length of the insulating layer (3) extending to the inner wall of the lead shielding tube (1) and the outer wall of the lead shielding tube (1) is more than 10 mm.
9. The lead shielding tube structure with good heat dissipation function as claimed in claim 1, wherein the thickness of the outer layer insulation (10) is the distance from the outer wall of the lead shielding tube (1) to the end of the conical barrel section of the corresponding support barrel (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121319434.XU CN215220475U (en) | 2021-06-15 | 2021-06-15 | Lead shielding tube structure with good heat dissipation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121319434.XU CN215220475U (en) | 2021-06-15 | 2021-06-15 | Lead shielding tube structure with good heat dissipation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215220475U true CN215220475U (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121319434.XU Active CN215220475U (en) | 2021-06-15 | 2021-06-15 | Lead shielding tube structure with good heat dissipation function |
Country Status (1)
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|---|---|
| CN (1) | CN215220475U (en) |
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2021
- 2021-06-15 CN CN202121319434.XU patent/CN215220475U/en active Active
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